You might want to try adding a little more clearances, .0015 to .0020 on both the front and back sides of the thrust bearing by sanding it on some medium grit sandpaper on a really flat surface, measure carefully while doing that scope
Drag race motor live a lot longer with looser rotating clearances than they do with them a tiny bit to tight work twocents

Last edited by Cab_Burge; 09/24/22 11:04 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)